Digital mobile station using presettable timeslot counter for compensating for propagation delay time
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United States of America Patent
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Nov 8, 1994
Grant Date -
N/A
app pub date -
Apr 30, 1992
filing date -
Apr 30, 1991
priority date (Note) -
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status (Latency Note)
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Abstract
In a TDMA cellular mobile communications system, a mobile station receives a TDM signal from a cell site and detects a sync, a timeslot assignment signal and a signal indicating the propagation delay time of signals between the cell site and the mobile station. From an assigned timeslot, a time interval from a detected frame sync to the time of transmission of a burst signal from the mobile station is determined. The propagation delay time indicated by the detected signal is subtracted from the determined time interval. When a frame sync is detected from the received TDM signal, clock pulses are counted until it corresponds to the subtracted time interval, whereupon a timing pulse is generated to cause a burst signal to be transmitted from the mobile station to the cell site.
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